TERRA-JET DJ 23

Built from our customer’s feedback and input, the DJ 23 is a modern evolution of productive and enhanced horizontal directional drill units designed by TERRA.

Powered by a proven 101 HP strong DEUTZ Diesel engine (Tier 4 final) the TERRA-JET DJ 23 offers up to 11 tons of thrust and pullback force, 3.100 Nm of torque and a maximum spindle speed of 284 rpm.

The compact, yet powerful machine reduces jobsite footprint and has increased productivity. The fast set up time, the increased movability and a user friendly operator interface make the DJ 23 one of the most productive HDD machines in its class.

The cabin of the hdd drill rig TERRA-JET DJ 23 can be turned from 0° to 60°, even if the operator sits in the cabine. The cabine turnes by a hydraulic cylinder.

Intelligent drilling assistant systems like the thrust control, carve mode, the drill speed control, the ADBSe and the AUTO TORK make the drilling more efficient and more easy. The operator can relax, the machine does the work. The electronical CLP control manages all drilling assistant systems and feels the underground. Like this the machine operates at highest performance. An integrated camera above the driving saddle allows a perfect view on the drill rod connector. It is transferred live on the 12” display in the cabin.

The DJ 23 is equipped with an on-board computer with large 12″ screen. It records the torque, the rotation speed, the drilling fluid volume and pressure and the drilling forces according to the German norm DVGW 321. The screen shows all relevant drill data like thrust and pullback forces, the torque, the rotation speed and the drill fluid pressures for a complete bore. Additionally the on-board computer makes the service diagnostics easy.

The high-pressure FMC pump is on board. With an increased drilling volume of 185 ltr/min contractors can face various challenging ground conditions. Optionally TERRA offers an FMC pump with 260 ltr/min of drilling volume.

Thrust and pullback of the driving saddle are carried out via rack and pinion drive. This is reliable and powerful. Three hydraulic motors with gear boxes move the driving saddle. The bent axis variable displacement motor of the driving saddle creates the high torque (AUTO TORK).

The integrated camera above the driving saddle allows a perfect view on the drill rod connector. It is transferred live on the 12” display in the cabin for best-in-class visibility.

TERRA has developed a new oscilating drill ramp for the DJ 23. It has two rotation points with two cylinders. With this unique system, the drill ramp can move from 19% up to 40% (11° – 22°). The rubber crawler stays at the ground up to 36% for a good stability.

Conventional HDD machines operate with a two-gear-control. They operate either with high torque at low speed or with high rotation speed at low torque. AutoTork is a new hydraulic-electronic control, which measures the underground and guarantees that the TERRA-JET always operates at its optimum. AutoTork starts at highest rotation speed with 284 rpm. If the ground gets harder and more torque is requiered at the drilling tool, AutoTork automatically increases the torque up to the required value and reduces the rotation speed accordingly.

The DJ 23 has 52 drill rods on board, each 3.05 m (10 ft) long. This adds up to a total drill length of 158.5 m (495 ft). The drill rod magazine is hot‐dip galvanized. This protects the surface. For longer bores you refill the magazine easily and fast or you just exchange the empty drill rod magazine against a full one.

The DJ 23 has a drive remote control. You can use it beside the HDD-machine. The DJ 23 can be driven by sitting in the cabine or walking besides the HDD-drill.